What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
Captain stated that at approximately 50 KTS on the take-off roll, smoke started to emit from the cockpit vents and smoke alarm warnings sounded. The take-off was aborted and the aircraft was evacuated. There were no injuries during the evacuation. The captain stated that the smoke dissipated as soon as the cabin doors were opened. Company maintenance performed engine runs in all bleed configurations and could not duplicate the problem. Maintenance suspects that de-ice fluid may have entered through the a/c environmental system as the cause. This discrepancy was properly cleared in the aircraft flight log. All necessary notifications and form submittals required by 14 CFR part 121 will be made by the air carrier to their cmo/cmu.
As the FAA filed it
CAPTAIN STATED THAT AT APPROXIMATELY 50 KTS ON THE TAKE-OFF ROLL, SMOKE STARTED TO EMIT FROM THE COCKPIT VENTS AND SMOKE ALARM WARNINGS SOUNDED. THE TAKE-OFF WAS ABORTED AND THE AIRCRAFT WAS EVACUATED. THERE WERE NO INJURIES DURING THE EVACUATION. THE CAPTAIN STATED THAT THE SMOKE DISSIPATED AS SOON AS THE CABIN DOORS WERE OPENED. COMPANY MAINTENANCE PERFORMED ENGINE RUNS IN ALL BLEED CONFIGURATIONS AND COULD NOT DUPLICATE THE PROBLEM. MAINTENANCE SUSPECTS THAT DE-ICE FLUID MAY HAVE ENTERED THROUGH THE A/C ENVIRONMENTAL SYSTEM AS THE CAUSE. THIS DISCREPANCY WAS PROPERLY CLEARED IN THE AIRCRAFT FLIGHT LOG. ALL NECESSARY NOTIFICATIONS AND FORM SUBMITTALS REQUIRED BY 14 CFR PART 121 WILL BE MADE BY THE AIR CARRIER TO THEIR CMO/CMU.